Community Fixes
Common problems grouped from confirmed-fix threads on SupraForums — 572 issues across MKIII threads
Systems
All Issues572Engine162Electrical143Other60Cooling42Body / Interior39Suspension35Transmission28Turbo20Fuel System15Brakes15Exhaust13Sort by:Most DiscussedSystem
Electrical72 threads
engine cranks but will not start
New build, no startCar won't turnover!Problem with the Supra (Code 24, won't start)+ 69 more threads
Electrical58 threads
no brake lights
quick ?; tail light failure box responsible for faulty brake lights?Alternator bug?Brake light problem with a twist....+ 55 more threads
Electrical51 threads
wiring harness connection location
megasquirt diy pnp build threadConnector with no place to go ?Modifying 7MGE Engine Harness to use 7MGTE ECU for NA-T Conversion+ 48 more threads
Electrical50 threads
tail light not illuminating
Tail light relayI have NO Tail Lights NEED HELPeasiest LED set up+ 47 more threads
Electrical46 threads
no spark when attempting to start
No spark & code14 in NA :(still NO SPARK!!! I NEED GOD'S HELP!Ecumaster waste spark ignition help: no spark+ 43 more threads
Electrical44 threads
no start after engine repair
car wont start sometimesCPS and timing...Sometimes, car won't start... only sometimes+ 41 more threads
Electrical41 threads
speedometer reading issue
What Is Wrong With My Speedo And Tach!! Wayyy Too High!!!!Can our stock speedometers be recalibrated?Speedomter Gear Count Riddle+ 38 more threads
Electrical37 threads
low coolant level indicated by warning light
what the hell does this light mean?WTF - crazy light in the dash? what is it?Light turned on on dash+ 34 more threads
Electrical35 threads
alarm system malfunction
Supra will not startAlarm system won't reset or allow car to startStock Alarm Problems! Help!+ 32 more threads
Electrical35 threads
alternator wiring diagram needed
90 mk3 help!!!!MR2 Alternator in 92T -- "drop in"??? How in the heck is this done?Help!! New Alt but still not getting charge!!+ 32 more threads
Electrical34 threads
unknown wiring issue
What is this yellow and black wire by the distributor? (Oil pressure sending unit)Is this suppose to be hooked up to something?Wiring (Again!!)+ 31 more threads
Electrical31 threads
high beam dash light failure after wiring change
Switched ground H4 headlights and LED H4's.HOW TO : Make your own Fail box eliminatorTaillamp failure sensor color+ 28 more threads
Electrical29 threads
fog light bulb replacement
Fog light immediate troubleHOW TO_Fog light mod for 1990+ Canadian Supra.Fog light relay connector Wiring color different than TSRM specs?+ 26 more threads
Electrical27 threads
turn signals hyper-flashing after LED conversion
Fuse box adapter for LED flasher?Turn signals wont workTurn signals dead...why?+ 24 more threads
Electrical26 threads
difficulty locating timing marks on CPS
CPS wiring issue7mgte CPS connector/wiresAnd so it begins+ 23 more threads
Electrical26 threads
difficulty engaging starter motor
mk3 starter relay mod questionsnightmare starter issuesStarter not working (Solved)+ 23 more threads
Electrical25 threads
multiple vehicle lights blinking intermittently
Taillights Turn off when brakes pressed ?Yet another dash light questionbattery died is it alt are battery+ 22 more threads
Electrical24 threads
tail lights fuse repeatedly blowing after hard braking
Keep popping fuses( EFI). i need a directionEfi fuse blew againThe interior as it looks today...+ 21 more threads
Electrical23 threads
replacing cam position sensor
new guy with some 7m-gte Q'sIs this bad?Timing Question...+ 20 more threads
Electrical23 threads
car will not start
MKIII won't start.Car will not startHelp with car not starting please.+ 20 more threads
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